The table shows a handful of the important events in the history of Earth and li

Question

The table shows a handful of the important events in the history of Earth and life. Today you'll work as a lab group to place these events along the 'great rope of geologic time- both on the handout and the rope at the front of the class. Fill out the right two columns of the table to determine the correct distance apart based on the time elapsed between events. There is room on the back of the page for your calculations. Throughout this course you will continue to add events to this timescale -please use it as a study guide. o Thru Geologic Time 13% Distance Event Oldest Preserved Rock Oldest Microbial Life Oldest Shelly Animals First Land Plants Dinosaur Extinction Earliest Hominids Recent Ice Age Last Ice Age ends Age 4000 Ma 3800 Ma 550 Ma 425 Ma 65 Ma 6 Ma 3 Ma 11.6 ka

Explanation / Answer

Well, one information was not available, the length of the rope in front of your clsss or the scale of the handout. What you should do is mark the events on the rope using the formulae below:

Distance of event from one end=% elapsed × length of rope

We were glad to answere this question. Do let us know if you have any further queries.

Regards.

Event Age % Through geological time scale Distance Oldest Preserved Rock 4000 Ma 13 % NA Oldest Microbial Life 3800 Ma 17.3 % NA Oldest Shelly Animals 550 Ma 88 % NA First Land Plants 425 Ma 90.7 % NA Dinosaur Extinction 65 Ma 98.58 % NA Earliest Hominids 6 Ma 99.86 % NA Recent Ice Age 3 Ma 99.93 % NA Last Ice Age Ends 11.6 ka 99.99 % NA

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